I'd agree with others to try and replace at least one of those fruits (the bananas or grapes) with a veggie or a lower-calorie fruit. I have trouble giving up on fruits too; try just replacing one or the other at first and see if it's an adjustment that's easy for you to make (I'd try the banana first).

Tuna is also fantastic for a high-protein, low-cal punch -- an entire can of it (non-albacore) is usually something like 100 cals.